EP0202861B1 - Appareil de soudage par rotation - Google Patents

Appareil de soudage par rotation Download PDF

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Publication number
EP0202861B1
EP0202861B1 EP86303674A EP86303674A EP0202861B1 EP 0202861 B1 EP0202861 B1 EP 0202861B1 EP 86303674 A EP86303674 A EP 86303674A EP 86303674 A EP86303674 A EP 86303674A EP 0202861 B1 EP0202861 B1 EP 0202861B1
Authority
EP
European Patent Office
Prior art keywords
driven
spin
shaft
servo motor
motor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP86303674A
Other languages
German (de)
English (en)
Other versions
EP0202861A3 (en
EP0202861A2 (fr
Inventor
Kenneth Robert Clark
John Pawel Bilko
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Crown Packaging UK Ltd
Original Assignee
CMB Packaging UK Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CMB Packaging UK Ltd filed Critical CMB Packaging UK Ltd
Priority to AT86303674T priority Critical patent/ATE48795T1/de
Publication of EP0202861A2 publication Critical patent/EP0202861A2/fr
Publication of EP0202861A3 publication Critical patent/EP0202861A3/en
Application granted granted Critical
Publication of EP0202861B1 publication Critical patent/EP0202861B1/fr
Expired legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/06—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using friction, e.g. spin welding
    • B29C65/0672—Spin welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/06—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using friction, e.g. spin welding
    • B29C65/069—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using friction, e.g. spin welding the welding tool cooperating with specially formed features of at least one of the parts to be joined, e.g. cooperating with holes or ribs of at least one of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1222—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a lapped joint-segment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1224—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a butt joint-segment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/128—Stepped joint cross-sections
    • B29C66/1282—Stepped joint cross-sections comprising at least one overlap joint-segment
    • B29C66/12821—Stepped joint cross-sections comprising at least one overlap joint-segment comprising at least two overlap joint-segments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/128—Stepped joint cross-sections
    • B29C66/1284—Stepped joint cross-sections comprising at least one butt joint-segment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/302—Particular design of joint configurations the area to be joined comprising melt initiators
    • B29C66/3022—Particular design of joint configurations the area to be joined comprising melt initiators said melt initiators being integral with at least one of the parts to be joined
    • B29C66/30223—Particular design of joint configurations the area to be joined comprising melt initiators said melt initiators being integral with at least one of the parts to be joined said melt initiators being rib-like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5344—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially annular, i.e. of finite length, e.g. joining flanges to tube ends
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/61—Joining from or joining on the inside
    • B29C66/612—Making circumferential joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822—Transmission mechanisms
    • B29C66/8221—Scissor or lever mechanisms, i.e. involving a pivot point
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822—Transmission mechanisms
    • B29C66/8222—Pinion or rack mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/824—Actuating mechanisms
    • B29C66/8242—Pneumatic or hydraulic drives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/93—Measuring or controlling the joining process by measuring or controlling the speed
    • B29C66/934—Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed
    • B29C66/93441—Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed the speed being non-constant over time
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/93—Measuring or controlling the joining process by measuring or controlling the speed
    • B29C66/934—Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed
    • B29C66/93451—Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed by controlling or regulating the rotational speed, i.e. the speed of revolution
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/824—Actuating mechanisms
    • B29C66/8246—Servomechanisms, e.g. servomotors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/924—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/9241—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force or the mechanical power
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/929—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools characterized by specific pressure, force, mechanical power or displacement values or ranges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/94—Measuring or controlling the joining process by measuring or controlling the time
    • B29C66/949—Measuring or controlling the joining process by measuring or controlling the time characterised by specific time values or ranges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/95—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94
    • B29C66/959—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 characterised by specific values or ranges of said specific variables
    • B29C66/9592—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 characterised by specific values or ranges of said specific variables in explicit relation to another variable, e.g. X-Y diagrams
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
    • Y10T156/1702—For plural parts or plural areas of single part
    • Y10T156/1744—Means bringing discrete articles into assembled relationship
    • Y10T156/1768—Means simultaneously conveying plural articles from a single source and serially presenting them to an assembly station
    • Y10T156/1771—Turret or rotary drum-type conveyor

Definitions

  • the invention relates to apparatus for spin-welding, which is a known technique for welding together components, particularly plastics components, which are assembled with opposed annular surfaces, in which one of the components is spun at high speed relative to the other to cause melting and subsequent fusion of the plastics material at the interface of the opposed surfaces.
  • the energy for the weld is generally provided by a rotating chuck.
  • a first type of method known for example from GB-A-1096571
  • pre-assembled articles to be spin welded are mounted on a chuck which is brought into and out of engagement with a rotating drive motor and are spun thereby for a period sufficient to create a weld.
  • a second method known for example from US-A-3297504, one of the components of the article to be welded is rotated at high speed on a chuck and is subsequently brought into engagement with the other component.
  • Drive to the chuck is discontinued, and the two components are welded together as the energy of rotation of the chuck is dissipated as frictional heat at the component interface.
  • precise control of the duration of the weld process and the amount of frictional heat generated at the weld are difficult to achieve.
  • a spin welding apparatus for welding together two parts of an article
  • a feed mechanism for successively feeding pre-assembled articles to a work station on the apparatus, a spin welding head for spinning one of the parts relative to the other at the work station to form a weld, and a ram assembly for moving articles at the work station into engagement with the spin welding head
  • the feed mechanism and the ram assembly are driven in timed relation from a first motor-driven shaft and wherein the spin welding head is driven by a servo motor, the drive of which is timed by a switch unit driven from the first shaft.
  • a container comprising a moulded plastics cylindrical body 1 provided with an integral bottom panel 2 and a plug fit end component in the form of a moulded plastics ring 3 adapted to be assembled into the open end of the body.
  • the bottom panel of the body has a plurality of external webs 4 which engage fixed pins located on the ram of the machine such that they prevent the body rotating during welding.
  • the ring 3 also has a number of external webs 5 which engage one or more driving pins in the spinning head of the machine and thereby provide drive for the spin-welding process.
  • Components such as shown in Figure 1 are described in greater detail in our co-pending British Patent application no. 8510817.
  • the spin-welding machine is supported on a frame 6 and has a main AC drive motor 7 driving a primary drive shaft 8 through a geared speed reduction unit 9, drive belt 90, and a pneumatic clutch 10.
  • the clutch is remotely operated by a programmable logic control system, Figures 10 and 11.
  • a hand wheel 11 may be used for manual rotation of the drive shaft during setting up.
  • a brake (not shown) may also be provided.
  • the feed mechanism 12, by which pre-assembled containers are fed to the work station, is driven from a secondary drive shaft 13 which is itself driven in an indexing motion from the shaft 8 via a Geneva mechanism 14.
  • a ram assembly 15, also driven from shaft 8, is operative to push the container at the work place into engagement with a spin-welding head 16.
  • the spin-welding head is driven by a servo motor 17 controlled by a switch unit 18 driven off the shaft 8.
  • the body 1 and ring 3 are pre-assembled before welding and are fed to the machine by a feed mechanism shown in Figure 3.
  • the pre-assembled containers have already been turned on their sides before being fed into the machine so they can roll down the infeed chute 19.
  • the gate is timed in sequence with the machine from the switch unit 18 and is operated when the transfer turret has stopped rotating.
  • the gate 20 moves sideways until a container therein is lined up with turret guides. The container is then free to drop under gravity into the transfer turret.
  • the sideways movement of the gate 20 causes it to interfere with the next following container in feed chute 19, preventing it from dropping. After a predetermined period, the gate is returned to its original position, allowing the next container to drop into the gate.
  • a pneumatic cylinder 200 with a solenoid valve (not shown) is used to operate the gate.
  • Rotation of the transfer turret 21 carries the containers from the infeed to the work station W and then to the discharge chute 25.
  • the interrupted motion of the transfer turret is provided by the Geneva mechanism 14.
  • the transfer turret comprises a pair of plates 23 mounted on shaft 13 and having peripheral part- circular cut-outs therein .to support the containers during their travel thereon. Outside guides and a rail prevent the containers being disturbed while the turret rotates.
  • the spin-welding process is carried out at the work station which is shown at W in Figure 3.
  • the container is held between the spin welding head shown in Figures 4 and 5, and the ram assembly 15.
  • the spin-welding head comprises a low inertia mechanism driven by a DC low inertia rare earth brushless servo motor 17 as shown in Figure 4.
  • Drive is taken to the spin welding head shaft 26 via a toothed belt 27.
  • the driven pulley 37 is mounted on one end of the shaft 26 which is horizontal.
  • a disc 28 of lightweight alloy is bolted directly to the opposite end of the shaft 26. Machined in its exposed face, the disc 28 has driving pins 29 which engage in the ring 3 and cooperate with the external webs 5 thereof to cause the ring to be driven in rotation.
  • the shaft 26 is mounted in two ball races 30.
  • the ram movement, to push a container into the spin welding head, is actuated by a cam 38 ( Figure 2) driven at the machine cycle speed on the shaft 8.
  • This cam action is transferred to the ram slider by a lever arm 51 pivoted at 52 and a connecting link 50. Dogs 151 located on the front face of the ram engage with the webs 4 to prevent the body 1 from rotating during welding.
  • a tourniquet comprising a loop of steel wire cable 39 which is retained in an annular groove 42 in a cable retaining housing 45 mounted on the spin-welding head.
  • the tourniquet When the tourniquet is in a relaxed condition, it forms a loop having a diameter slightly greater than that of the container to be welded.
  • the ejector ring moves axially under the influence of the springs 47 to close off the annular groove 42 and to retain the wire cable 39 therein, as shown in Figure 4.
  • one end of the cable 39 is rigidly anchored at 40 whilst the other end is attached to a pneumatic cylinder 41.
  • a small release area 43 is cut out of the cable retaining housing 45 to allow the cable to cross over at 44 at the cable's entry and exit points.
  • the assembled container body and end component are fed into the cable retaining housing and through the loop of the cable 39.
  • the driving pins 29 are located as described below and the pneumatic cylinder 41 is operated to apply a tension to the cable such that the cable loop diameter is decreased, thereby producing the desired external pressure on the body 1 necessary for the spin-welding process.
  • the pneumatic cylinder 41 is returned to its original position, releasing the external pressure and allowing the container to be ejected.
  • the ejector ring 46 is free to move forward, thereby pushing the now welded container out of the cable retaining housing and closing the annular groove 42.
  • the manner of overlap of the wire cable is shown more clearly in Figure 7.
  • any given components to be spin-welded there will be a preferred or medium interference fit which occurs when both components conform exactly to their design dimensions. Due to the variations in component size, within normal plastics moulding tolerances, the interference fit between any two components may differ significantly from the preferred value.
  • a range of interference fits which can lead to successful welds under commercial conditions may be defined as extending from a loose fit having a diametric interference substantially less than the medium fit to a tight fit having a diametric interference substantially greater than the medium fit.
  • the specific values of diametric interference for "loose”, “medium” and “tight” fits will, of course, vary according to the nature of the components being welded.
  • the preferred or medium interference fit between the components is about 0.75mm (that is, the internal diameter of the body 1 when relaxed is 0.75mm less than the external diameter of the ring 3 when relaxed).
  • a loose fit may have a diametric interference of about 0.25mm and a tight fit may have a diametric interference of about 1.25mm.
  • the ideal contact pressure between the surfaces during welding has been found to be about 0.23 Newtons/mm 2. It has been shown that for the example quoted, the radial pressure required to maintain the contact pressure between the welding surfaces at about 0.23 Newtons/mm 2 needs to be about 0.25 New- tons/mm 2 for the loose fit situation of 0.25mm diametric interference, and about 0.07 Newtons/ mm2 forthe tight fit situation of 1.25mm diametric interference.
  • Such pressures enable both extremes of fit to be satisfactorily spin-welded to give a fully-fused integral joint in a total time of about 0.21 seconds at 1000rpm, wherein 0.05 seconds is required to accelerate the end component to the required speed, and 0.08 seconds is required to electromagnetically brake the system to the stationary position.
  • This total time can be reduced by choosing a greater contact pressure or by increasing the motor speed, or both.
  • the first is based on the force required to fully assemble the end component into the side wall of the container prior to spin-welding.
  • the measurement of the insertion force may be made on a preliminary assembly machine which fits rings 3 to bodies 1 or at an assembly station that forms an integral part of the spin welding apparatus.
  • the second method is based on the measurement, on the spin-welding machine itself, of the current required by the spin-welding servo motor to produce a torque sufficient to spin, at a low speed such as 70rpm, the end component within the side wall when fully assembled.
  • a low speed such as 70rpm
  • the engagement time can be extended for a short period such as 0.1 second during which time the torque required for slowly spinning the end component within the side wall can be measured and related to a diametric interference between end component and side wall by means of a previously established correlation relationship.
  • a voltage is generated by a servoamplifier which is an analogue of the motor current.
  • This measured voltage is received in a control system where it is compared with the voltages predetermined to represent various fit types e.g. loose, medium and tight.
  • various fit types e.g. loose, medium and tight.
  • Each of the various fit types will in practice represent a band of the full range of possible fits extending from the very loose fit to the very tight fit. The sensitivity of the system will depend on the number of such bands which are distinguished.
  • the control system will also identify and lead to the ejection of assembled components wherein the interference fit is either so loose or so tight that a satisfactory weld will not be possible under the prevailing operating conditions.
  • the drive of the servo motor is governed by an amplifier which can be controlled through a programmable logic controller to provide the required time velocity profile for the motor during the welding process. Operation of the motor 17 is timed to the machine cycle from the switch unit 18. On initiation of the weld process the amplifier is energised and the motor is run at a slow speed for a short time to enable the driving pins 29 of disc 28 to engage the external webs 5 of ring 3 and fixed dogs 151 of the ram to engage the webs 4 on the base of the container. After the webs have been engaged, the current required to run the servo-motor at the predetermined slow speed is measured, to classify the interference fit, and the appropriate radial pressure to be applied by the tourniquet is selected.
  • the output of the amplifier is ramped such that the motor is rapidly accelerated to its welding process speed and retained at this speed for a period decided by the nature of the particular container type being welded.
  • the amplifier is de-energised and the motor is stopped by the friction generated at the weld. Stopping of the motor can also be assisted by braking or by powered ramping down of the speed.
  • Figure 8 is a graphic representation of the machine cycle over one rotation of the primary shaft 8.
  • Lines AB and HJ represent the movement of the turret through one indexed motion (i.e. 90° of the secondary shaft 13).
  • the curves CD and FG represent the forward and return movements of the ram. As can be seen, there is a slight overlap of the ram motion with the movement of the turret. In the period defined between points D and F the ram is stationary in its forward position and during this period the welding takes place.
  • FIG. 9 is a diagrammatic time(t)/velocity(v) curve for the motor 17 during the period between the points D and F. From Figure 9 it will be seen that the motor 17 is stopped before the point F.
  • the period XY during which welding takes place can be altered according to the nature of containers being formed.
  • the current taken by the motor 17 over the welding period XY may be monitored and compared with a previously established datum. If the load on the motor applied by the weld is below a predetermined level, a satisfactory weld will not be formed. By monitoring the current taken by the motor during the weld period, unsatisfactory welds can be identified and the container rejected.
  • the period defined between the points D and F may be of the order of 0.4 seconds.
  • a pneumatic cylinder 41 Whilst a pneumatic cylinder 41 has been described for applying tension to the cable 39 in order to apply an inwardly directed radial pressure to the wall 1 the cylinder 4 may if desired be replaced by a solenoid or a servo motor system connected directly to the cable.
  • the cable 39 is able to apply a narrow hoop of radial pressure to the end wall 1 it may be replaced, if desired by a ring of segments each urged against the wall 1 by, for example, pneumatic or hydraulic means.
  • Figure 10 shows diagrammatically the functional interrelationship between the different parts of the apparatus, and in particular, the control connections between the spin-welding machine and the programmable logic controller.
  • Figure 11 is a diagrammatic representation of the system for controlling the application of radial pressure, and shows in particular the control connections between the electronic system for measuring the parameter which represents the interference fit, the programmable logic controller and the tourniquet adjusting system which adjusts the radial pressure applied during welding.
  • FIG 12. An alternative form of spin welding head is shown in Figure 12. This embodiment, which is shown in connection with an end ring 3 and container wall 1 of simplified profile, is appropriate for use when moulding tolerances can be accurately maintained such that control of the radial pressure "Pw" as provided by the embodiment described in relation to Figures 5 - 7 is no longer required.
  • a pressure ring 31 acts to provide a constant radial pressure "Pw" during welding and comprises twenty four spring steel segments 32 which effectively form a continuous ring.
  • the segments are cantilevered out from a support ring 33 to which they are attached by screws.
  • a garter type spring 34 is mounted over the segments to provide controlled hoop pressure during the welding process.
  • the support ring is mounted on a ball race 35 such that the whole pressure ring assembly can rotate with the plastics body until the fixed pins on the ram assembly are located against the webs 4 to prevent damage to the external decoration of the plastic body.
  • An annular cover 36 protects the segments and the garter spring 34. It also acts as a stop preventing excessive inward deflection of the segments when no article is inserted into the spinning head.
  • the ram assembly has two functions. The first is to push the pre-assembled containers through the pressure ring 31 and into engagement with the disc 28, and to hold them there with the correct end pressure until the spin welding process is complete. The second function is to pull the now welded containers back to the correct position for transfer to the discharge station. In order to carry out the second function, pivoted clamps (not shown) are mounted on the ram to grip the body 1 during the ram's return stroke.
  • the method and apparatus described are particularly suitable for welding container components made from thermoplastics materials such as polyethylene, polypropylene, copolymers thereof, or polyamides when in a form flexible enough to yield under the imposed inwardly directed radial force to achieve the interference fit necessary for spin welding.
  • thermoplastics materials such as polyethylene, polypropylene, copolymers thereof, or polyamides
  • the invention has been described in terms of radially contracting a cylindrical wall against a plug therein, the same controls of inter-component interference may be achieved in principle by spreading the plug against the interior of the cylindrical wall.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)

Claims (10)

1. Appareil de soudage par rotation pour souder ensemble deux pièces (1, 3) d'un article comprenant un mécanisme de distribution (12) pour distribuer successivement des articles pré- assemblés à un poste de travail (W) sur l'appareil, une tête de soudage par rotation (16) pour faire tourner une des pièces relativement à l'autre au poste de travail afin de former une soudure, et un chariot-coulisseau (15) pour mettre les articles au poste de travail en engagement avec la tête de soudage par rotation, caractérisé en ce que le mécanisme de distribution et le chariot-coulisseau sont actionnés en relation synchronisée à partir d'un premier arbre (8) entraîné par moteur et en ce que la tête de soudage par rotation est actionnée par un servo-moteur (17) dont l'entraînement est minuté par une boîte de commutation (18) commandée à partir du premier arbre (8).
2. Appareil selon la revendication 1, caractérisé en ce que le mécanisme de distribution comprend une tourelle à mouvement intermittent (21) montée sur un second arbre (13) entraîné à partir du premier arbre (8) par l'intermédiaire d'un mécanisme croix de Malte (14).
3. Appareil selon la revendication 1 ou 2, caractérisé en ce que le premier arbre (8) est entraîné par un moteur électrique à courant alternatif (7) par l'intermédiaire d'une unité de réduction de vitesse à engrenage (9) et d'un embrayage pneumatique (10).
4. Appareil selon l'une quelconque des revendications précédentes caractérisé en ce que le coulisseau du chariot-coulisseau est actionné à partir d'une came (38) montée sur le premier arbre.
5. Appareil selon l'une quelconque des revendications précédentes caractérisé en ce que le servo-moteur (17) est un servo-moteur à courant continu de faible inertie (17) et l'entraînement du servo-moteur est gouverné par un contrôleur logique programmable programmé pour fournir une vitesse de rotation initiale lente afin de garantir un début d'entraînement correct des articles, une accélération rapide jusqu'à la vitesse du travail de soudage, un maintien de cette vitesse de travail pendant une période requise, et une décélération finale rapide et un arrêt du moteur.
6. Appareil selon la revendication 5, caractérisé en ce que le contrôleur logique programmable est relié au servomoteur (17) via un amplificateur.
7. Appareil selon la revendication 6, caractérisé en ce que le contrôleur logique programmable est programmé pour désamorcer l'amplificateur à la fin de ladite période requise de sorte que le servo- moteur (17) soit ralenti et arrêté par les forces de friction produites à la soudure.
8. Appareil selon l'une quelconque des revendications précédentes caractérisé en ce que la tête de soudage par rotation (16) comprend des moyens (39, 40, 41) pour appliquer une pression radiale sur la zone de soudure pendant le soudage.
9. Appareil selon la revendication 8, caractérisé en ce que les moyens pour appliquer une pression radiale comprennent un tourniquet à câble métallique (39).
10. Appareil selon la revendication 8, caractérisé en ce que les moyens pour appliquer une pression radiale comprennent une pluralité de segments élastiques (32) disposés sur la circonférence et poussés radialement vers l'intérieur par un ou plusieurs ressorts (34).
EP86303674A 1985-05-24 1986-05-14 Appareil de soudage par rotation Expired EP0202861B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86303674T ATE48795T1 (de) 1985-05-24 1986-05-14 Vorrichtung zum reibschweissen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8513240 1985-05-24
GB8513240A GB8513240D0 (en) 1985-05-24 1985-05-24 Spin welding machine

Publications (3)

Publication Number Publication Date
EP0202861A2 EP0202861A2 (fr) 1986-11-26
EP0202861A3 EP0202861A3 (en) 1988-10-05
EP0202861B1 true EP0202861B1 (fr) 1989-12-20

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EP86303672A Expired - Lifetime EP0203760B1 (fr) 1985-05-24 1986-05-14 Appareil de soudage par rotation
EP86303673A Expired - Lifetime EP0204448B1 (fr) 1985-05-24 1986-05-14 Procédé et appareil pour le soudage par rotation
EP86303674A Expired EP0202861B1 (fr) 1985-05-24 1986-05-14 Appareil de soudage par rotation

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EP86303673A Expired - Lifetime EP0204448B1 (fr) 1985-05-24 1986-05-14 Procédé et appareil pour le soudage par rotation

Country Status (19)

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US (3) US4741788A (fr)
EP (3) EP0203760B1 (fr)
JP (3) JPS61283477A (fr)
AR (1) AR241876A1 (fr)
AT (3) ATE48795T1 (fr)
AU (3) AU581760B2 (fr)
BR (3) BR8602331A (fr)
CA (3) CA1255930A (fr)
DE (3) DE3667631D1 (fr)
ES (3) ES8703767A1 (fr)
FI (3) FI83942C (fr)
GB (4) GB8513240D0 (fr)
GR (3) GR861341B (fr)
IN (3) IN167320B (fr)
MY (3) MY101220A (fr)
NO (3) NO862066L (fr)
NZ (3) NZ216199A (fr)
ZA (3) ZA863590B (fr)
ZW (3) ZW10586A1 (fr)

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Also Published As

Publication number Publication date
BR8602331A (pt) 1987-01-21
EP0202861A3 (en) 1988-10-05
US4743331A (en) 1988-05-10
GB2175535A (en) 1986-12-03
IN167280B (fr) 1990-09-29
EP0202861A2 (fr) 1986-11-26
FI83941C (fi) 1991-09-25
ES8703768A1 (es) 1987-03-01
BR8602332A (pt) 1987-01-21
IN167320B (fr) 1990-10-06
EP0203760B1 (fr) 1990-02-28
ATE50532T1 (de) 1990-03-15
CA1261582A (fr) 1989-09-26
ATE50531T1 (de) 1990-03-15
JPS61283477A (ja) 1986-12-13
GB8611718D0 (en) 1986-06-25
GB8611717D0 (en) 1986-06-25
MY101219A (en) 1991-08-17
EP0204448A2 (fr) 1986-12-10
FI862176A0 (fi) 1986-05-23
NO862068L (no) 1986-11-25
AU5761586A (en) 1986-11-27
EP0204448A3 (en) 1988-10-12
ZW10686A1 (en) 1986-09-03
CA1255930A (fr) 1989-06-20
BR8602330A (pt) 1987-01-21
US4741788A (en) 1988-05-03
ZA863591B (en) 1986-12-30
DE3669128D1 (de) 1990-04-05
FI83940C (fi) 1991-09-25
JPS61283479A (ja) 1986-12-13
US4721546A (en) 1988-01-26
JPS61283478A (ja) 1986-12-13
MY101221A (en) 1991-08-17
EP0203760A3 (en) 1988-10-12
FI862176A (fi) 1986-11-25
JPH0232131B2 (fr) 1990-07-18
FI83942C (fi) 1991-09-25
GB2175536B (en) 1989-06-28
GB2175535B (en) 1989-06-28
ZA863621B (en) 1986-12-30
ZA863590B (en) 1986-12-30
FI862175A (fi) 1986-11-25
FI862177A0 (fi) 1986-05-23
DE3667631D1 (de) 1990-01-25
AU5761686A (en) 1986-11-27
JPH0232130B2 (fr) 1990-07-18
NZ216198A (en) 1987-05-29
GB2175537B (en) 1989-06-28
NO862066L (no) 1986-11-25
NZ216199A (en) 1987-05-29
MY101220A (en) 1991-08-17
GR861341B (en) 1986-09-23
JPH0348021B2 (fr) 1991-07-23
FI862177A (fi) 1986-11-25
ES555265A0 (es) 1987-03-01
GB8611716D0 (en) 1986-06-25
FI83941B (fi) 1991-06-14
NZ216197A (en) 1987-05-29
NO862067L (no) 1986-11-25
EP0204448B1 (fr) 1990-02-28
ATE48795T1 (de) 1990-01-15
IN167319B (fr) 1990-10-06
GR861340B (en) 1986-09-23
AR241876A1 (es) 1993-01-29
AU582852B2 (en) 1989-04-13
ES8704113A1 (es) 1987-03-16
EP0203760A2 (fr) 1986-12-03
ES555263A0 (es) 1987-03-16
AU5761786A (en) 1986-11-27
AU581760B2 (en) 1989-03-02
ES8703767A1 (es) 1987-03-01
AU584702B2 (en) 1989-06-01
ES555264A0 (es) 1987-03-01
ZW10486A1 (en) 1986-09-03
ZW10586A1 (en) 1986-09-03
FI83940B (fi) 1991-06-14
GB2175536A (en) 1986-12-03
FI83942B (fi) 1991-06-14
GB8513240D0 (en) 1985-06-26
GB2175537A (en) 1986-12-03
GR861339B (en) 1986-09-23
FI862175A0 (fi) 1986-05-23
DE3669127D1 (de) 1990-04-05
CA1261581A (fr) 1989-09-26

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